when store or delete?an 'one-to-many' object to database,it aways update the 'set' defined part.
It is wait time in store process and will be error in delete.
it is to avoid by set the "inverse = true" .
?
I will test affect in 'find' and 'update' process.
'find' and 'update' don't have any infection with or without 'inverse=true'.
the 'inverse' default ?set to 'false';